package day07;

public class HomeworkVerCode {
    public static String getcode(int num){
        char[] chs={'a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p'
                ,'q','r','s','t','u','v','w','x','y','z','A','B','C','D','E','F',
                'G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U',
                'V','W','X','Y','Z','0','1','2','3','4','5','6','7',
                '8','9','0'};
        String code=" ";
        for(int i=1;i<=num;i++){
            int idex=(int)(Math.random()* chs.length);
            code+=chs[idex];
        }
        return code;
    }




    public static void main(String[] args) {
        String code =getcode(6);
        System.out.println("验证码为："+code);
    }
}
